“Just having it on your phone is an additional way for someone to hack into your information,” says April.

And a recent experiment gives her reason to be concerned.

The computer software company Symantec intentionally lost 50 phones in four cities just to see what would happen when they were found. Special software was installed to track the phones and what people did with them.

In half of the cases, the finder tried to return the cell, but not before snooping around.